Regarding bureaucratic oversight, I note that at least a few years ago, as I discovered when I wanted to do some stats of my own and fed wind farm lists into a spreadsheet, it was the more precise numbers (to the kW, but even those to the MW) released by the big national wind associations that were ridiculous. On one hand, the database maintainers were incapable of correct addition and multiplication resp. feeding into a spreadsheet to do the math (BWEA's still isn't...), on the other hand, delayed or PR-motivated premature project completion announcements from developers led to corrections. So it was always give or take 5%.

_{*Lunatic*, n.
One whose delusions are out of fashion.}